What is the worst thing about YOUR tool?

axcxnj wrote:

Looks similar to the Grivel Machine 3.0 design.  although that was forged and not CNCd

you will probably want something additional on the handle area so that you arent directly grabbing cold metal in freezing temps.  

Does anyone know one of the Grivel Machine 3.0 tool, l lost one a glacier recently and like to buy a couple.

L.L. Biner aka Mario

Got a few folks to test my new model including the ice boss Jeff Mercier. It's like a Nomic/Hydra but better clearance and better swing. 

Going to hit some ice fests next year once I machine a few more and get a demo fleet going.

Ya'll forum engineers are funny

And I got prov patents on my new and original design

• This is my tool. There are many like it, but this one is mine.
• My tool is my best friend. It is my life. I must master it as I must master my life.
• My tool, without me, is useless. Without my tool, I am useless.

Houghton Gremlin wrote:

Got a few folks to test my new model including the ice boss Jeff Mercier. It's like a Nomic/Hydra but better clearance and better swing. 

Going to hit some ice fests next year once I machine a few more and get a demo fleet going.

Ya'll forum engineers are funny

Looks pretty different from page 1.   Did ya use any advice from MP’s certified ASME review board?    
Petzl has obviously had some issues with handle design in terms of stress management 

I’d be curious myself how it’s constructed (generally… no IP prying haha) and how it climbs.  I’ve been trying nearly any dang thing I can put my hands on but haven’t found anything that beats my well tuned 1st Gen Nomic yet (on pure ice)

I did pretty much a similar project in the mid 90’s when there was a LOT of meat on the bone for axe design (when combining/crossing a Quasar with a Pulsar was a “genius” idea lol)

Kyle Tarry wrote:

FEA is a really poor tool for evaluating cracking that propagates from small localized stress concentrations, especially if the FEA model is a normally meshed solid of the entire part.  Accurate representation of stress concentrations is far too dependent on mesh resolution and node locations in very tiny areas, which is not sufficient in probably 95% of FEA models (and 99.9% of large part models meshed with default mesh settings).

My job is FE analysis and simple adaptive mesh generation can work very well modelling stress fracture propogation ( sciencedirect.com/science/a…). However, there are loads more models that combine with FEA with mathematical moddling of propogation. Stress fracturing starts with stress though so as long as you can model this well and keep things below plastic deformation and limit work hardening, things should be OK for an ice axe.

You are right though, never rely on a rough meshing to model local stresses, only adaptive models give good peak stress results.